Summary
Overview
Work History
Education
Skills
Websites
Timeline
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Robert Sonnelitter

Sterling

Summary

Skilled Software Engineer with 4+ years of experience working on enterprise-grade systems in the financial services sector. Proven ability to lead modernization efforts, integrate complex APIs, and optimize data flows. Demonstrated leadership and adaptability through transitioning legacy systems to cloud-based infrastructure while acting as subject matter expert and mentor across agile teams.

Detail-oriented, organized, and meticulous employee. Works at fast pace to meet tight deadlines. Enthusiastic team player ready to contribute to company success.

Overview

8
8
years of professional experience

Work History

Software Engineer

Freddie Mac
08.2020 - Current
  • - Lead engineer on modernizing Freddie Mac’s credit processing system, transitioning from legacy vendor-dependent infrastructure to an internal microservices architecture.
  • - Migrated application from Oracle WebLogic to Red Hat OpenShift, enhancing deployment efficiency and system scalability.
  • - Developed REST APIs in Java using Spring Boot and implemented end-to-end data flow transformations leveraging Java streams.
  • - Created custom stubbing tools to simulate vendor responses and enable local development/testing for teammates.
  • - Acted as SME and interim tech lead for the credit system, interfacing with external vendors and internal stakeholders to troubleshoot production issues and deliver enhancements.
  • - Advocated for realistic timelines with management during scope misalignment, influencing strategic planning.

Teaching Assistant

Pennsylvania State University
01.2018 - 01.2020
  • - Assisted professors in managing students and assignments for courses including Intro to Object-Oriented Programming, Intro to IST, and Networking.
  • - Delivered substitute lectures including a full session on software testing.
  • - Provided tutoring and feedback to improve student comprehension and course outcomes.
  • 3 Semesters (2018–2020)

Software Testing Intern

CardConnect (Fiserv)
05.2019 - 08.2019
  • - Collaborated with an agile team to test payment gateway APIs.
  • - Created Postman collections to automate test execution and integrated them into a Jenkins CI pipeline.
  • - Developed a Dockerized JMeter testing environment to run server-side performance and load tests.

Education

Bachelor of Science - Information Sciences and Technology, Security and Risk Analysis

The Pennsylvania State University
01.2020

Skills

  • Languages: Java, JavaScript, Python
  • Frameworks/Technologies: Spring Boot, Spring Framework, Docker, OpenShift, ActiveMQ, REST APIs
  • Tools: Postman, Jenkins, JMeter, Git, Jira
  • Databases: MongoDB, Oracle SQL
  • Concepts: Agile (Scrum), Software Testing, API Integration, Data Mapping, Load Testing, Microservices
  • System debugging
  • Agile
  • Build releases
  • Object-oriented programming
  • Virtualization
  • Design and development
  • Testing and debugging
  • JIRA

Websites

Timeline

Software Engineer

Freddie Mac
08.2020 - Current

Software Testing Intern

CardConnect (Fiserv)
05.2019 - 08.2019

Teaching Assistant

Pennsylvania State University
01.2018 - 01.2020

Bachelor of Science - Information Sciences and Technology, Security and Risk Analysis

The Pennsylvania State University

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Robert Sonnelitter